活塞顶面的起吊孔边缘和第一道环槽根部的裂纹是由于_______产生的A.热应力B.机械应力C.应力集
活塞顶面的起吊孔边缘和第一道环槽根部的裂纹是由于_______产生的
A.热应力
B.机械应力
C.应力集中
D.过热
请帮忙给出正确答案和分析,谢谢!
参考解答
正确答案:C
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